Question

Which observational tool helped astronomers Arno Penzias and Robert Wilson discover the

(CMB)?
A.
optical telescope
B. radio telescope
C. a digital camera
D. space telescope
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Answer 1

A radio telescope helped the astronomers discover the CMB.

Step-by-step explanation:

• Penzias and Wilson while experimenting with a radio telescope in 1964, accidentally discovered the radiation that exists universally also known as the CMB.
• This was used to support the "Big Bang Theory" and not the "Steady State Theory"
• CMB is the faint cosmic radiation that fills up the universe. It provides important data for understanding early universe.
• This data tells us about the composition of the universe and its age which raises new questions about the universe.